268 KJELLMAN, THE ALG# OF THE ARCTIC SEA. 
in this as in other species of Dictyosiphon are generated beneath the cortical layer and 
at first covered by it. Seen from the surface, they are ellipsoidical or rounded-ellip- 
soidical in shape, usually with their longer axis in the direction of the leneth of the 
frond; occasionally they are spherical. They occur in dense masses in f. abbreviata, 
less numerous in f. elongata. When fully developed, their long axis (in the direction 
of the length of the frond) attains 60 «.; fig. 14—15. 
It seems to me that the species D. hippuroides would become too vague, if a plant 
so different from its typical form as that now described should be included within it, 
as I have formerly done 1. ec. 
Habitat. The present species occurs on the upper part of the sublitoral zone, 
attached to stones, in 2—45 fathoms, f. abbreviata in exposed localities, f. elongata in 
sheltered ones. ‘The former was found gregarious in considerable numbers. I have 
collected specimens with zoosporangia of f. abbreviata on the west coast of Novaya 
Zemlya in July, f. elongata on the north coast of Norway in September. 
Geogr. Distrib. Known from the Norwegian Polar Sea and the Murman Sea. The 
northernmost point is Gribowa Bay on the west coast of Novaya Zemlya Lat. N. 73°. 
Localities: The Norwegian Polar Sea: Finmarken at Talvik, f. elongata, local 
and scarce. 
The Murman Sea: Gribowa Bay f. abbreviata. 
Dictyosiphon hippuroides (Lynes.) Ktvrz. 
Tab. Phye. 6, p. 19. Scytosiphon hippuroides Lynas. Hydr. Dan. p. 63. 
~ 
f. typica. 
Descr. Dictyosiphon hippuroides Argscu. Obs. Phye. 3, p. 26. 
Fig. » » Kutz Inicntao2- 
Exzsice. » » ArescH. Alg. Scand. exsice. N:o 105, 320, 321. 
f. fragilis Harv. (nob). 
Dictyosiphon fragilis Harv. in Kurz. Spec. Alg. p. 485. 
Descr. Dictyosiphon fragilis Kurz. |. c. 
Fig. » » >) Mab. (Phyeso sito. 
Syn. Dictyosiphon foeniculaceus @ ArnscH. Phye. Scand. p. 369. 
» hippuroides Gosr, Algenfl. Weiss. Meer. p. 66. 
» » KseLLM. Spetsb. Thall. 2, p. 38; Algenv. Murm. Meer. p. 46; ex parte. 
» » Keen, Nordl. Alg. p. 34. 
Remark on the forms. This species, though less multiform in the Polar Sea than 
the following one, still occurs in several marked forms, of which especially one, besides 
the typical, seems to be characteristic. The typical form I hold to be that which 
ArxrscuouG has distributed under N:o 105 in Alg. Scand. Exsicc. It is the commonest. 
Besides this, there exists another in the Norwegian Polar Sea, in which I believe to 
recognize D. fragilis described and figured by Ktrzinc. By its looser consistency and 
its dense, coarse branches increasing in thickness upwards, it differs considerably from 
